Navigating the various dates printed on food products can be confusing, often leading consumers to discard perfectly safe food. It is crucial to understand that, with the sole exception of infant formula, the dates on food packaging are voluntarily added by manufacturers, not mandated by the federal government. These dates primarily serve as indicators of peak quality or freshness, rather than safety. Food manufacturers conduct scientific testing to determine these dates, aiming to inform consumers when a product will have its optimal flavor and quality.

Several common phrases are used on food labels, each carrying a specific meaning related to quality and storage. "Best By" or "Best if Used By/Before" informs consumers about the period of optimal flavor or quality. The "Use By" date signifies the last date recommended for use to ensure peak quality and, like other quality dates, is not a safety indicator unless it appears on infant formula. "Sell By" dates are primarily for retailers, guiding them on inventory management by indicating how long a product should be displayed for sale. Lastly, "Freeze By" dates advise customers on when to freeze a food item to best preserve its quality.

While these dates are about quality, it's important to know when food genuinely becomes unsafe to eat. Many items, such as milk, packaged lunch meat, or other foods prone to faster spoilage, can still be safely consumed a few days or even up to a week past their "Best By" date without safety concerns. Food stored in the freezer can last indefinitely in terms of safety, though its flavor and texture may diminish after a few months. Pantry staples like canned goods, cereal, pasta, and cookies often remain safe to eat for years, provided their packaging is intact and free from damage like rust or swelling. However, similar to frozen foods, these items might experience a decline in quality over time, leading to stale or off-flavors.

Despite the flexibility regarding consumption dates, ignoring potential signs of spoilage is risky. Although many people might consume spoiled food without immediate illness, there is still a risk of developing symptoms such as nausea and diarrhea. Therefore, relying on your senses is paramount for identifying unsafe food. Red flags indicating spoilage include the presence of mold, a sour or unusual smell, discoloration, curdling, or an overly watery or slimy texture.

To help prevent foodborne illnesses and reduce waste, maintaining proper storage conditions is essential. The U.S. Department of Agriculture (USDA) recommends keeping your refrigerator at 40 degrees Fahrenheit or below and your freezer at 0 degrees Fahrenheit or below. Here are specific guidelines for various food items:

• Milk: Lasts about 7 days in the fridge. Toss if it has a bad smell, curdling, is lumpy, yellow, or has crusty edges. Can be frozen for 3 months.
• Yogurt: Safe for 1-2 weeks in the fridge. Discard if mold, discoloration, or a bad smell is present. Can be frozen for 1-2 months.
• Cottage Cheese: Keeps for about 1 week. Look for a bad smell, grainy texture, or wateriness.
• Sliced Swiss and Cheddar Cheese: Unopened, lasts up to 6 months; after opening, 3-4 weeks. Signs of spoilage include mold, bad smell, crumbly texture, or sliminess. Can be frozen for 6 months.
• Eggs: Good for 3-5 weeks from refrigeration. If an egg floats when dropped in water, it's likely spoiled. Raw egg whites can be frozen for up to 1 year; yolks do not freeze well.
• Beef (raw): Lasts 1-2 days. Discard if it has a bad smell or is tacky to the touch. Raw beef can be frozen for 4-12 months; cooked beef for 2-3 months.
• Chicken (raw): Safe for 1-2 days. Look for a dark color, sliminess, or a bad smell. Can be frozen for 9 months to 1 year.
• Seafood: Good for 1-2 days. Unsafe if it has a sour, rancid, fishy, or ammonia odor. Freeze for 3-8 months.
• Deli Meat / Luncheon Meat: Lasts 3-5 days (deli meat and opened packaged luncheon meat). Discard if slimy, discolored, or has a bad smell. Can be frozen for 1-2 months.
• Ketchup: 6 months after opening. Watch for discoloration, wateriness, or a bad smell.
• Mustard: 1 year after opening. Check for discoloration, wateriness, or a bad smell.
• Pickles: 1-3 months after opening. Signs include discoloration, wateriness, or a bad smell.

To further extend the freshness and safety of your food, consider these expert tips: keep raw meat, fish, and poultry separate from other foods and on the lowest shelf in the fridge to prevent cross-contamination from leaks. Avoid storing eggs and milk in the refrigerator door, as this area experiences the most temperature fluctuations. Pantry items should be stored in cool, dry places, not in humid areas like basements. Utilize your freezer for items that can be frozen. Keep bananas separate from other fruits, as they release ethylene gas which can accelerate spoilage. Similarly, avoid storing vegetables and herbs in the same compartment as fruits. High-acid canned foods, such as tomatoes and other fruits, can last up to 18 months, while low-acid canned foods like meat and vegetables can be stored for two to five years. Ultimately, developing a habit of using your eyes and nose to assess freshness and quality is a more reliable method than relying solely on printed dates.